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Method and arrangement for bi-directional relaying in wireless communication systems

A radio and relay node technology, applied in wireless communication, radio relay system, radio transmission system, etc., to achieve the effect of enhancing communication performance

Inactive Publication Date: 2008-02-20
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior information is not optimally utilized in the prior art, for example, and other gains in transmit power and / or increased throughput are required to meet the ever-increasing demands of increased coverage and data rates

Method used

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  • Method and arrangement for bi-directional relaying in wireless communication systems
  • Method and arrangement for bi-directional relaying in wireless communication systems
  • Method and arrangement for bi-directional relaying in wireless communication systems

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Embodiment Construction

[0035] The traditional 4-stage approach as described with reference to Figure 1 can be enhanced by using a priori known information for interference cancellation in the receiving node in the two-way relay system. However, in systems where the medium is of the broadcast type, as in typical wireless cellular or wireless multi-hop networks, the broadcast nature of the channel is not optimally utilized by the proposed method and apparatus. Specifically:

[0036] - the transmit power or energy is not optimally utilized in the relay node, thus affecting the signal-to-noise ratio (SNR) of the received signal after interference cancellation at the receiving station;

[0037] - Energy received directly from an end node station (via another end node in receive mode) is not optimally utilized. Specifically, this signal was not optimally utilized with the relay signal; and

[0038] - The receiver required by the previously proposed method is complex.

[0039] The present invention prov...

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PUM

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Abstract

The present invention relates to methods and arrangements in a relaying radio node and / or in a sending / receiving radio node, adapted for use in a relaying communication system. The relaying node is in bidirectional communication with at least a first and a second sending / receiving radio node, and the relaying radio node receives at least a first signal carrying at least first data and a second signal carrying at least second data. The relaying node generates (215) a reduced representation of at least the first and second signal, with a reduced information content as compared to the first and second data, by a joint non-linearly encoding operation, and transmits (220) the reduced representation to at least the first and the second communication node. The first and second sending / receiving node can extract data from the reduced representation by a non-linear decoding operation (225) using stored a priori information.

Description

technical field [0001] The present invention relates to wireless communication systems utilizing two-way relays. In particular, the method and arrangement according to the invention relate to a relay node forming and transmitting a composite data packet comprising information from at least two previously received data packets. Background technique [0002] A major impetus for the development of wireless / cellular communication networks and systems is to provide increased coverage or support for higher data rates, or a combination of both, among many others. At the same time, the cost aspect of building and maintaining the system is extremely important and is expected to become even more so in the future. The issue of increased battery consumption as data rates and / or communication distances increase is another concern. [0003] Until recently, the major topologies of wireless networks, including the three existing generations of cellular networks, have not changed at all. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/15H04BH04W16/26
CPCH04L2001/0097H04B7/15592H04W16/26H04B7/15521H04L1/0041H03M7/30
Inventor P·拉森N·约翰森K·-E·苏内尔
Owner TELEFON AB LM ERICSSON (PUBL)
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